← Port Encyclopedia
677
Port-677
TCP
System Low Risk
Reserved or unassigned port 677 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 677

nmap -sV -p 677 target
nmap -sV -sC --script=banner -p 677 target
nc -zv target 677

🛡️ Security Considerations

  • Scan port 677 with nmap -sV to identify the exact service and version
  • If Port-677 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-677 to find known exploits
  • Monitor traffic on port 677 with Wireshark or tcpdump for anomalies
  • Ensure the service is patched to the latest version to prevent known CVE exploitation

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📍 Nearby Ports

Port 672
Port-672
Port 673
Port-673
Port 674
Port-674
Port 675
Port-675
Port 676
Port-676
Port 678
Port-678
Port 679
Port-679
Port 680
Port-680
Port 681
Port-681
Port 682
Port-682
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